如何用foreach遍历页面上所有的TextBox(转载)

2.指定formID里TextBox 判断

先找出你的Form的IDprotected HtmlForm yourformID;

foreach (object obj in yourformID.Controls){if (obj is TextBox){TextBox tb = (TextBox)obj;if (tb.Text = string.Empty){Response.Write("<script>alert('" + tb.ID + "的值为空。');</script>;")}}}

3.另一种遍历法

   foreach (Control c in Page.Controls)   {    foreach (Control childc in c.Controls)    {     if (childc is TextBox)     {          ((TextBox)childc).Text = string.Empty;     }    }   }